Ijnitei



j j QW-. NNNN NITED stares PATENTOFFC.

Rioni). M. Hon, on NEW YoRK, N. x.

i` `PRINTrias-relaties. l

Specification of Letters Patent No. hlfdated` April 17, 1844.

T0 all whom t may concern: j A j Be it known thatI, RIGHABDM. Hon, ofthe-city of New York, in the State of New York, civil engineer andmachinist, have invented a new and useful Improvement in the Manner ofConstructing Cylinder Print` ing-Presses; and Ido hereby declare thatthe following is afull and exact description thereof. j i j In thecylinder printing press, as ordinarily4 constructed, there occurs aslur, or slip,- When the cylinder arrives at the head and the foot linesof the page on the form, oc-

casioned by a slight sinking of the cylinder` in passingthose points,the consequence of which is that the types, or stereotype plates, aresubjected to a more rapid wear in those parts, than elsewhere.r j

The object of my improvement is the cor' rection of this evil; For thispurpose, I

` place a bearer of iron, or of steel, on each side of the bed of thepress, upon which bearers the cylinder is to roll, andlto be susl tainedduring the whole time "the blanket is `not bearing on the type. Thesebearers Vmay be about an inch and a half inwidth, and they are to be cfathickness equal to the length of the type, orthe height of fa stereotypeplate. I also makean enlargement of eachend of the cylinder aroundthatpart of it which is to rest on the bearers. This enlargement may bein width the same with that of the bearers,'and the parts composing itare to rise above the general surface of the cylinder, to the `thicknessof the `blanket which is to cover` that `portion of the cylinder whichpresses upon the form;` by which means the `two surfaces will workexactly together, and no slur can takevplace.

The accompanying drawing gives na perspective representation of myimproved printing press, of which A, A,'is the cylinder, and B, B, thebed."

C, C, arethe bearers extending along on each side of thebedLj Thesehareshown as consisting of two wedge-formed bars placed one upon the other,and attached .to the bed by adjusting screws." A pair of these bars isrepresented, separately, below the` frame of the press. The twowhenplaced one upon thejother` are `to be equal in height to the j ordinarylength 'of printing type," 'or the thickness ofstereotype plates; but asthese vary a little, the wedge-formed bearers `admit of their beingadjusted so as to adapt` them `to any form. i

D, D, represent the enlargements on the cylinder, which extend aroundthat part of it which is not covered by the blanket, and which is torise above the general surface of 'the cylinder to such height as willcorrespond with the thickness of said blanket.

The cylinderpress is in all other respects to be constructed in themanner already known and patented. V i

Having thus,fully described the nature of my improvement in the cylinderprinting press, what I claim therein as new, Vand desire to secure byLetters Patent, is-

The employmentof adjustable bearers on the sides of the bed, incombination with the enlargement of the cylinder, in the manner,

and for the purpose, set forth; and it is to i be understood that I donot intend to limit myself tothe mode of adjusting the bearers byforming them of twowedgelike bars, as

herein described, as such `adjustment may be effected in other ways; butI have men-` tioned this mode as that which `I `have deemed to be themost'simple, and the best.

.j Biotin. Muon..

`'Witnesses i i A. J. BOWEN,"` THos. S. HOLLINGSWORTH.

